| FXN | function |
|---|---|
| IRF | idiopathic retroperitoneal fibrosis; impulse response function; interferon regulatory factor; intern... |
| KF | Kenner-fecal medium; kidney function; Klippel-Feil [syndrome] |
| LFS | lateral facet syndrome; Li-Fraumeni syndrome; limbic forebrain structure; liver function series |
| LSF | linear spread function; lymphocyte-stimulating factor |